Apparatus for manufacturing tire casings



March 10, 1931. A. o. ABBOTT, JR 1,795,178

APPARATUS FOR MANUFACTURING T'IRE CASINGS Filed Sept. 24, 1928/ BMW TTORNEY AiUNiTED STATES Vilatented Mar. 10, i931 PATENT oTTICE ADRIAN O. ABBOTT, JR., OF DETROIT, MICHIGAN, ASSIGNOR TO MORGAN @t WEIGHT, 0F Y DETROIT, MICHIGAN, A CORPORATON OF MICHIGAN f so APPARATUS FOR MANUFACTURING TIRE CASINGS Application filed September 24, 1828. Serial No. 308,090.

This inventionrelates to a machine for einV panding automobile tires from the flat pulley band form to the normal tire shape and is an improvement over the device disclosed in my Patent No. 1,507,563, granted Sept. 9, 1924.

lt is the object of this invention to provideY a new and eicient means for forming a seal between the pulley vband and the apparatus for expanding the pulley band.

1Without intending to limit my invention more'than is required by the prior art, and with the specific embodiment disclosed in mind, it'consists in providing elastic rings at the sides of a casing, Y which elastic rings may be expanded to admit a-pulley band and then allowed to contract so as to contact with the pulley band to forni a seal therewith.

JFor a clear understanding of my invention reference should be made to the following detailed description and the accompanying drawings in which: l

Fig. 1 is an elevation of my machine;

Y Fig. 2 is a central vertical section ot my machine showing the pulley band in position;

Fig. 8 is a detailed View partlyin section' showing the means for expanding an elastic ring. Y

The pulley band 1 is inserted within the casing 2 which consists oi the annular side wall 3, and top and'bottom end walls 4 and A 5, said casing beingfof an annular form having a central aperture therethrough as indicated at 6, which freely admits the pulley Y band 1, there being considerable play between the walls or" the aperture 6 and the ypulley band, as shown clearly in Fig. 2. In

order to provide a seal between the casing and the pulley band the elastic rings 7 are provided. Y

The elastic rings 7 are positioned on the outside of the top and bottom end walls 4 and 5, as shown in Fig. 2, andare held in position by the circular plates 8 suitably secured to the end walls. The plates 8 cooperate with the walls 4 and 5 to provide the circular slots l13 which are embedded within the material of the ring. Airunder pressure is ted to the cylinders 11 through the pipe connections 111 which lead from a suitable source of pressure.

The casing 3 is supported upon the pedestal 2O which also serves as a table upon which the lower edge of the pulley band may rest when lirst positioned in the machine.

Suction is applied to the casing 3 through the pipe connection 14 from any suitable source.

In order to permit the formed tire to be removed from the casing, after it has been shaped, the upper plate 4 oi the machine is hingedly mounted on the casing as at 15, see Fig. 1, and a weighted lever system 16, pivoted to the pedestal as at 17 and to the plate 4 as at 18, is provided for opening the casing after the completion of a cycle oi operations. A. flexible tube'19 is interposed in the pipe system 12 so as to' permit the opening of the top plate 4.

In the operation of the machine pressure is introduced into the cylinders 11 through the pipe system 111 thereby expanding the elastic rings 7 so that a pulley band 1 may be'introduced into the machine. rlhe pulley band is positioned on the upper surface of the pedestal '20 and the pressure acting in cylinders 11 is released thereby allowing the elastic ring 7 to contract so as to Contact with thepulley band and form a seal therewith. Suction is then applied through pipe 14 to 2 inseriva the casing 3 which dravvs thepulley band to tire shape as indicated in dotted'lines, in Fig.

y vshaping operation.' rlhe curing bag is introduced into the tire 1n the usual manner, thev upper plate 4 lifted by the leversystem 16 Y v2. As the pulley band changes shape the ring V7 Vserves to maintain theA seal betr/veen the pulley band and the casing. in the initial stagesof the o aerationwhile the edges ofthe yaperture 6 contact with the pulley band to Vitorm a'seal during the final stages' of the and the formed tirej casing With-the curing ybag therewithin is. removed :from the .ma-

chine, y y

lWhile one' specific embodiment 'of lmy inf vention has been described in detail, ,other forms or my invention such as Would occur to one skilled in the art are contemplated, and

ceive a pulley band there'vvithin, fan elastic ring at each end of the casing adapted to contact With the pulley bandito form a seal, and Y means for connection tos'aid ring at different Vplaces around its peripheryv for stretching the ring so as to permit theinsert-ion of the pulley band therewitlun.

Sie'ned vat Detroit count of Wa ne` State n 7 y y f or" Michigan, this 18thr day of September,

Danni o. ABBorrnJR.

for an v'understanding o .the lscope of my -V invention reference should be made to the following claims', v Y c Having thus described my invention What I claim and desire to protect byLetters Patent is:

l. In a pulley band expanding machine in combination, a rigid annular casing open along ,its inner periphery and adapted to receive a pulley band-Within its inner periphery, expansible -means for creating a seal .with the pulley band,-and piston means for expanding said expansible means to facilitate the insertion of the pulley 'band Within said casing. Y. f

2.111 a: pulley'band expanding machine in combination, an annular casing` open along its inner periphery and adaptedto receive a .pulley bandtherevvithin, an elastic ring at each end of the casing' adapted to contactvwith the pulley band to form a seal, and separate circumferentially spacedY means for 'stretching the ring so as .to permit the insertion of the pulley band'therevvithin.

3. In a pulley band expanding,` machine in combination, an annular vcasing,` open along its inner periphery and adapted to receive a pulley band therewithin, an elastic ring at each end of the casing adapted to contact with a pulley band to :torm a seal, and 'a series of pistons connected withl said` ring at spaced intervals` said pistons being operable to expand the ring so as `to permit the insertion of the pulley band.

ll. In a' pulley band expanding` machine in combination, a non-collapsible annular. casino" onen 'alon its inner eri aber andy b L v A v v adapted .to receive a pulley band, an expan-v sible ring at each vend of the'casing, ,pistonv operated means actuable to expand the ring to admit the pulley band and to releasevthe ring to permit it to form a seal with the' pulley band, and means for creating suctionl Within said casing. v

5. In' a' pulley band' expandingL machine in combination, anv annular. casing opening along its inner peripheryy andadapted'to rej 

